Device for mounting of a turnable implement

A rotator intended to be applied between a crane arm and an implement for rotating the implement around a first pivot axis relative to the crane arm, said rotator comprising:

• an attaching part that can be pivot-mounted to the crane arm via a joint for slewing the implement around a second pivot axis, the attaching part carrying a swivel pin that is pivot-mounted in a housing that can be joined to the implement, the swivel pin containing hydraulic medium passages parallel to the first pivot axis that open into circular cavities of a swivel coupling included in the housing and in which housing are arranged passages for a hydraulic medium for supplying the working chambers of a drive for rotating the implement relative to the attaching part;
• and
• a swivel and slip-ring unit for conveying electrical signals between the implement and a control system via the crane arm that exhibits a stator joined to the swivel pin and a rotor joined to the housing,
• wherein a passage is arranged extending between one of the swivel pin hydraulic medium passages and the inner space and a strand of the electrical wiring exits the crane arm and extends through said hydraulic medium passages and the passage, respectively.

A unit for crane-mounted rotatable implements comprising:

• a rotator locatable between the crane arm and the implement that at one end is pivot-mounted to the implement for rotating the same relative to the crane arm and slewing around a first pivot axis and at the other end is mountable to the crane arm via a hinged link for slewing around a second pivot axis;
• a swivel coupling arranged on the rotator for supplying the working chambers of a drive for the rotator with a hydraulic medium;
• one or more connecting unions provided to one end of the swivel coupling, said connecting unions being provided with hydraulic medium lines leading from the crane arm, wherein:
• the hinged link between the crane arm and the rotator is designed as an open joint defined by two hinged points located at a distance from each other along the joint axis of the second pivot axis,
• the connecting unions are arranged extending parallel to the first pivot axis and facing towards the second pivot axis, whereby the hydraulic medium lines connected to the connecting unions pass between the said hinged points located a distance from each other,
• the crane arm is of the extendable telescopic type comprising two telescopic boom-like parts mounted one inside the other,
• the rotator comprises an attaching part connectable to the crane arm via a pivot joint that carries a swivel pin that for slewing around the first axis of rotation is pivot-mounted to a housing joined to the implement, and
• the swivel pin includes parallel hydraulic medium passages running in the direction of the first axis of rotation and opening into circular cavities of the swivel coupling included in the housing and to which housing are arranged passages for supplying the working chambers for a drive for rotating the implement relative to the attaching part, whereby the passages extend diagonally through part of the housing and the swivel pin exhibits an end face facing the second pivot axis on which are arranged a set of protruding connecting unions;
• and
• a guide for the lines arrangable on the free end of the crane arm between which guide and the crane arm the lines are arrangable during the relative movement of the boom-like parts, wherein the guide comprises a rigid arm, one end of which is fastenable at the hinged link on the free end of the crane arm and which arm, locatable parallel with the outer section of the crane arm and a distance from its upper side, exhibits an inside to face the crane arm against which the lines are brought and fixed.